Can I just put in a one way door then seal the hole? Or should I trap it then seal?

They're rodents.

Trap and then seal. If you seal first, the squirrel WILL chew another way in or out.

Thats what I was thinking thanks.

I have to laugh when I am told about a squirrel chews a hole in good wood, a one way door is place and then a day later hole sealed. and the customer said they chewed a hole right next to the old one the next day. I never thought they would do that.

Flyers don't chew. Reds and Greys do.

How do you know for sure the sqr. came out?

He's in the trap(s) just outside the hole?

A one way door trap, not just a one way escape door.

That's not true down here in Ga. Flyers aren't AS bad, but they love to make a perfectly round hole. They can and often will chew back in when not properly trapped and removed. Though most of the time I see flyers it is because they are taking advantage of poor construction, they will help their way in by chewing. Run up on a colony in a house that's been there a while, and don't think they won't wear some teeth out to get back in.

To answer the original question, one way doors normally work well. Make sure you have a cage on the end and make sure you know all points of entry/exit. Nothing like have a cage over a hole and having them use a different exit/entry.

Jeremy beat me to it. I once run drip edge all the way around just to have a flier drill through gable rake fascia to get back in.

yeah beat me to it also.

I think I like our flyers better! All we need is a bat cone after sealing the place.

You know, Ido remember a job where I had a chew in after seal up. I thought a red had done it but flyers were caught in the door/hopper I placed I figured a red had started the opening and left, but now you have me wondering.

I love squirrels

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No better way to explain the need for effective exclusion.